<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <script src="./js/vue.js"></script>
    <title>Document</title>
</head>
<body>
    <div id="app">
        <div v-bind:style="[baseStyle,moreStyle]">Hello Vue.js</div>
    </div>
</body>    
    <script>
        var vm = new Vue({
            el: '#app',
            data: {
                baseStyle: {
                    border: '2px solid black'
                },
                moreStyle: {
                    width: '100px',
                    height: '100px'
                }
            }
        })
    </script>
</html>